Bruce, there's not a way to do this without modification the code, that I recall. Been a while since I worked on this project so I may be wrong. Making the changes yourself should be pretty straight forward in the GetListing() method of FtpClient.cs. Let
me know if you have any questions.

The latest commit includes a new untested FtpListOption.NoPath flag you can pass to GetListing() to omit sending a path argument. Let me know if it works, I've not tested it all, just added it and made sure the code builds.